In an experiment, a leaf was partially covered with black paper, and other part was exposed to light. On testing the leaf for starch, it may be concluded that photosynthesis had occurred in
(a) uncovered green part of leaf
(b) black paper covered part of leaf
(c) no part of leaf

In the experiment where a leaf was partially covered with black paper and the other part exposed to light, testing the leaf for starch would reveal that photosynthesis had occurred in the uncovered green part of the leaf due to the presence of light, while the covered part would have minimal or no starch due to the lack of light.